I'm not sure what you mean by "filled", but Sky3DS won't work with A9LH unless a CFW is already running. If you already have a CFW, you can just use .cia files to do whatever you need to, including installing Homebrew Launcher Loader by yellows8.

DS Flashcards should work, but any card that requires a 9.2/9.0 Firmware will have the same results as the Gateway, since now them support coldbooting with A9LH yet. Sky3DS is the only one that works because basically acts like normal gamecard and doesn't need a CFW to work properly.